CN102708780A - Control device, electro-optical device, driving method for electro-optical device and electronic apparatus - Google Patents
Control device, electro-optical device, driving method for electro-optical device and electronic apparatus Download PDFInfo
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- CN102708780A CN102708780A CN2012100230767A CN201210023076A CN102708780A CN 102708780 A CN102708780 A CN 102708780A CN 2012100230767 A CN2012100230767 A CN 2012100230767A CN 201210023076 A CN201210023076 A CN 201210023076A CN 102708780 A CN102708780 A CN 102708780A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
- G09G3/344—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/04—Partial updating of the display screen
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0257—Reduction of after-image effects
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
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- General Physics & Mathematics (AREA)
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- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
A control device for a display unit that includes pixels each having display elements is disclosed. The control device comprises a control unit counting sections where pixels with different gradations are placed next to each other in a predetermined region among an image to be displayed on the display unit. The control unit outputs an instruction to execute a refresh drive in the predetermined region when an integrated value of the sections exceeds a predetermined value.
Description
Technical field
The present invention relates to be reduced in the technology of the after image (afterimage) that the profile of display image takes place.
Background technology
As the display element of electro-optical device, the known element that has electrophoresis element, electronics powder element, cholesteric liquid crystal element etc. to utilize storage property.For the purpose of simplifying the description, be made as the two-value demonstration that this display element for example carries out white and black.The occasion that for example whole pixels is changed to white in order to carry out white comprehensively demonstration; Utilize storage property execution differential driving; That is, the pixel of white in the image before not driving, and be white (with reference to patent documentation 1) with the pixel drive of the black beyond the white in the preceding image.
But in the differential driving, whole pixels have the problem that after image takes place to the boundary vicinity of the pixel of white transformation in the pixel that continues as white with from black easily when white changes.In addition, after image when black changes, also takes place in the pixel that continues as black with from white to the boundary vicinity of the pixel of black transformation in whole pixels in same after image easily.In addition, this after image appears along the profile that changes preceding image, therefore is also referred to as the profile after image.
Summary of the invention
The present invention proposes in view of the above problems, and one of its purpose provides and can reduce such after image and realize high-quality technique for displaying.
Above-mentioned after image is thought following reason: when for example white pixel was adjacent with black picture element, in white pixel and the black picture element, the influence in a side the pixel was to the opposing party's pixel, though 2 pixels after homochromy transformation, this influence is also remaining.Thereby,, should eliminate remaining influence through refreshing driving in order to eliminate after image.But such refreshing drives meaningless ground consumed power.Especially one of principal character of considering the display element with storage property is a low consumpting power, and the formation that refreshes driving that this characteristic is run counter in frequent execution is not preferred.
Thereby; Control device of the present invention is a kind of control device of display part; Above-mentioned display part comprises the pixel that has display element respectively; When the accumulated value that pixel is counted with the adjacent place of different gray scales in the zone of regulation in the above-mentioned display part images displayed was surpassed setting, the indication that refreshes driving was carried out in output in the zone of afore mentioned rules.
Among the present invention; Preferably; When above-mentioned accumulated value surpassed the afore mentioned rules value, indication was different from the rewriting of the pixel of above-mentioned single gray scale after the pixel that the zone comprised of afore mentioned rules all is rewritten as single gray scale in the pixel that the zone comprised of indication afore mentioned rules.Constitute according to this, can carry out the high-quality demonstration of nothing left picture by refreshing to drive.
During this constituted, preferably, above-mentioned accumulated value was afore mentioned rules value when following, indicated the rewriting that the pixel of change is arranged in the zone of afore mentioned rules.Through the execution of this differential driving, can suppress meaningless power consumption.
Among the present invention, can comprise: trimming function, pixel is with the adjacent place of different gray scales in the zone of extraction afore mentioned rules; Tally function is to the place counting of extracting out through above-mentioned trimming function; Discrimination function is differentiated the accumulated value that obtains through this tally function and whether is surpassed the afore mentioned rules value.Here, above-mentioned trimming function can be after the demonstration of last time above-mentioned single gray scale, extracts the pixel place when adjacent with different gray scales for the first time out.
In addition; Above-mentioned purpose can be reached by control device; This control device is the control device that comprises the display part of the pixel that has display element respectively; This control device, when the accumulated value that in the zone of regulation, all is changed to the place counting of same gray scale with different gray scale adjacent pixels in the above-mentioned display part images displayed was surpassed setting, the indication that refreshes driving was carried out in output in the zone of afore mentioned rules.According to this control device, be in the problem that so not eye-catching state has also carried out replacement even can improve after image.
Here, the zone of afore mentioned rules can be made up of whole pixel in a plurality of pixels in the above-mentioned display part, also can be made up of partial pixel.Especially, when the zone of regulation is made up of partial pixel, frequently changes in the zone of displaying contents and can make after image not eye-catching.
In addition, above-mentionedly refresh driving and preferably comprise the step that whole pixel that the zone comprised of afore mentioned rules is rewritten as single gray scale.
In addition, the present invention can be electro-optical device, this method of driving electro-optical device except control device, but also can be the electronic equipment with this electro-optical device.
Description of drawings
Fig. 1 is the block diagram of formation of the electro-optical device of the 1st embodiment of the present invention.
Fig. 2 is the diagrammatic sketch of the equivalent electrical circuit of the pixel in the display part.
Fig. 3 is the key diagram of the work of electrophoresis element.
Fig. 4 is the process flow diagram of work of the electro-optical device of the 1st embodiment.
Fig. 5 is that the profile among the 1st embodiment detects the process flow diagram of handling.
Fig. 6 is the key diagram that moves of the concerned pixel among the 1VRAM.
Fig. 7 be with the 1st embodiment in the key diagram of comparison of concerned pixel.
Fig. 8 is the diagrammatic sketch of variant of display image of the electro-optical device of the 1st embodiment.
Fig. 9 is the diagrammatic sketch of the example that refreshes driving among the 1st embodiment.
Figure 10 is the diagrammatic sketch of the example of the differential driving among the 1st embodiment.
Figure 11 is that the profile among the 2nd embodiment detects the process flow diagram of handling.
Figure 12 is the key diagram of the boundary marker among the 2nd embodiment.
Figure 13 be with the 2nd embodiment in the key diagram of comparison of concerned pixel.
Figure 14 is that the profile among the 3rd embodiment detects the process flow diagram of handling.
Figure 15 is that the profile among the 3rd embodiment detects the process flow diagram of handling.
Figure 16 be with the 3rd embodiment in the key diagram of comparison of concerned pixel.
Figure 17 is the diagrammatic sketch of the demonstration example in the application examples.
Figure 18 is the diagrammatic sketch of electronic equipment that is suitable for the electro-optical device of embodiment.
The explanation of symbol
1... electro-optical device, 10... display part, 20... pixel, 22...TFT, 30... display element; 32... pixel electrode, 34... electrophoresis layer, 36... common electrode, 51... 1VRAM, 52... 2VRAM; 60... controller (control device), 100... viewing area, 112... sweep trace, 114... data line; 130... scan line drive circuit, 140... data line drive circuit, 1000... E-book reader, 1100... wrist-watch
Embodiment
< the 1st embodiment >
Below, with reference to the description of drawings embodiments of the invention.Fig. 1 is the block diagram that the electricity of the electro-optical device 1 of the 1st embodiment constitutes.Like this figure, electro-optical device 1 comprises display part 10,1VRAM51,2VRAM52 and controller 60.
Wherein, in the display part 10, a plurality of sweep traces 112 are along row (X) direction setting among the figure, and a plurality of data lines 114 edges are listed as the settings of (Y) direction, and keep electrical isolation each other with each sweep trace 112.Pixel 20 respectively with the corresponding setting that intersects of each sweep trace 112 and each data line 114.For ease, the line number of sweep trace 112 is made as " m ", when the columns of data line 114 is made as " n ", pixel 20 with vertical m capable * the rectangular arrangement of horizontal n row, constitute viewing area 100.
Scan line drive circuit 130 is selected one of capable sweep trace 112 of m according to the control of controller 60, and the sweep trace 112 of this selection is supplied with the signal of high (High) level, other sweep traces 112 is supplied with the signal of low (Low) level.
Data line drive circuit 140 drives the data line 114 of each row respectively according to the displaying contents of 1 row amount of the pixel 20 of the sweep trace 112 that is positioned at selection.
1VRAM51 and 2VRAM52 be have respectively with m capable * video-ram of each self-corresponding storage area of the pixel 20 that n row are arranged, respectively by controller 60 visits (read-write).As after state, during the change of the displaying contents of display part 10,1VRAM51 storage image after changing, 2VRAM52 storage image before changing.Thereby, through the memory contents of comparison 1VRAM51 and the memory contents of 2VRAM52, can differentiate pixel that will change demonstration (will rewrite) and the pixel of not rewriting.
Controller (control device) 60 comprises all control part 62, temporary transient storage part 64, refreshes drive control part 66, differential driving control part 68.Wherein, when all control parts 62 are controlled each, through program implementation, the trimming function of stating after the execution, tally function, discrimination function etc.
Temporary transient storage part 64 is RAM, the variable that adopts during the work temporarily stated after the storage.
Refresh drive control part 66 change display parts 10 and want the occasion of images displayed, when after satisfying, stating condition, difference gated sweep line drive circuit 130 and data line drive circuit 140 are to drive the whole of driving pixels 20 through refreshing.
Differential driving control part 68 change display parts 10 are wanted the occasion of images displayed, and when stating condition after not satisfying, difference gated sweep line drive circuit 130 and data line drive circuit 140 are only to drive the pixel 20 (differential driving) that change is arranged.
In addition, controller 60 is connected with among Fig. 1 stage arrangement (CPU) on the abridged, and regulation display part 10 is wanted images displayed.
Fig. 2 is the diagrammatic sketch of the equivalent electrical circuit of the pixel 20 in the display part 10, the formation of intersecting corresponding 2 * 2 meter 4 pixels of having represented that and (i+1) that below adjacent row capable with i and j row and right-hand adjacent (j+1) thereof be listed as.Here, i, (i+1) are the marks of the row of remarked pixel 20 arrangements prevailingly, are the integer below the 1 above m, and j, (j+1) are the marks of the row of remarked pixel 20 arrangements prevailingly, are the integer below the 1 above n.
Like Fig. 2, each pixel 20 possesses thin film transistor (TFT) (thin film transistor: hereinafter to be referred as " TFT ") 22, display element 30, the auxiliary capacitor 40 of n channel-type.
Each pixel 20 has identical formation; Therefore describe typically with the pixel that is positioned at the capable j row of i; In the pixel 20 of the capable j row of this i, the gate electrode of TFT22 is connected with the capable sweep trace 112 of i, on the other hand; The data line 114 of its source electrode and j row is connected, and its drain electrode and an end of display element 30 are that an end of pixel electrode 32 and auxiliary capacitor 40 is connected respectively.
Though display part 10 is not shown, has the electrophoresis layer 34 of dielectricity and constitute by device substrate that has formed pixel electrode 32 and the counter substrate clamping that has formed common electrode 36.Thereby, when display element 30 is regarded equivalent electrical circuit as, become electric capacity by pixel electrode 32 and common electrode 36 clamping electrophoresis layer 34.When display element 30 keeps (storage) two interelectrode voltage, according to the direction of an electric field by this sustaining voltage generation, the demonstration of stating after carrying out.
In addition, auxiliary capacitor 40 is constituting by the pair of electrodes clamping dielectric layer that forms in the device substrate side.The electrode of the other end of auxiliary capacitor 40 is connected with the shared electric capacity line 132 of each pixel jointly.
In addition, through diagram abridged external circuit, voltage Com is applied to common electrode 36, and voltage Vss is applied to electric capacity line 132, and here for the purpose of simplifying the description, voltage Com and voltage Vss are made as the earthing potential of voltage reference (0V).
The demonstration work of display element 30 is described with reference to Fig. 3.
In such formation; Like Fig. 3 (a), common electrode 36 is applied for example 0V of voltage Com, pixel electrode 32 is for example applied-voltage of 15V; Relatively; When making common electrode 36 remain on than the high current potential of pixel electrode 32, white particles 34w attracted to common electrode 36 sides, and black particles 34b attracted to pixel electrode 32 sides.Common electrode 36 adopts ITO, and (Indium Tin Oxide: tin indium oxide) wait the conductive layer with transparency, and counter substrate is made as the formation with transparency, when common electrode 36 sides were observed, these pixel 20 visuognosiss were white.
On the other hand; Like Fig. 3 (b), common electrode 36 is applied the for example voltage of 0V, pixel electrode 32 is for example applied+voltage of 15V; Relatively; When making common electrode 36 keep than the low current potential of pixel electrode 32, black particles 34b attracted to common electrode 36 sides, and white particles 34w attracted to pixel electrode 32 sides.Its result, when common electrode 36 sides were observed, these pixel 20 visuognosiss were black.
In addition; As electrophoresis layer 34; In the gap of 2 substrates (2 electrodes), in being employed in the micro-capsule 35 that is full of with dispersion medium 34e, the formation of dispersed charged particles, also can be that the formation of charged electronics powder body or the formation of enclosing cholesteric liquid crystal are enclosed in no micro-capsule ground.They all are the formations that keeps the voltage of pixel electrode 32 and common electrode 36, show according to the direction of an electric field that is produced by this sustaining voltage.
The summary work of electro-optical device 1 then, is described.The process flow diagram of the processing (main flow) that Fig. 4 carries out when being the displaying contents change.This processing controller 60 from stage arrangement be that CPU carries out when receiving the indication of change displaying contents and accepting the supply of view data after changing.
At first, among the step Sa1, all control parts 62 in the controller 60 read out in 1VRAM51 image stored data, make carbon copies 2VRAM52.Then, among the step Sa2, the view data after changing that all control parts 62 will be supplied with is stored at 1VRAM51.
Among the step Sa3, all control parts 62 are differentiated variable Count and whether are surpassed threshold value Th1.Here, variable Count white pixel and black picture element in the displaying contents of 1VRAM51 storage add " 1 " vertical or laterally each when adjacent, and when refreshing driving execution, reset to zero.Thereby variable Count representes from the accumulated value that drives the place that white pixel is adjacent with black picture element displaying contents beginning, display part 10 that refreshes last time.
When the reason of after image thinks that white pixel is adjacent with black picture element as stated, the influence the opposing party's in two pixels in a side the pixel pixel, even 2 pixels after homochromy transformation, this influence is still remaining.Thereby, think to surpass under the state of threshold value Th1 that when carrying out differential driving for the change displaying contents, after image takes place with the degree that can't ignore at the variable Count of the accumulated value of representing the number of times that white pixel is adjacent with black picture element.Thereby, when all control parts 62 are differentiated variable Count above threshold value Th1 in step Sa3, in step Sa4, refresh driving to refreshing drive control part 66 indications.Thereby, in the display part 10, by after state refresh and drive actual display part 10 images displayed of rewriting.Then, among the step Sa5, all control parts 62 reset to zero in order to prepare the driving that refreshes of next time with variable Count.
On the other hand, think variable Count under the state below the threshold value Th1, even carry out differential driving in order to change displaying contents, after image is not eye-catching yet.Thereby all control parts 62 are differentiated variable Count in step Sa3 be threshold value Th1 when following, in step Sa6, differential driving control part 68 indicated differential driving.Thereby, in the display part 10, by after the actual rewriting of differential driving display part 10 images displayed stated.
Behind step Sa5 or the Sa6, all control parts 62 are visited 1VRAM51 in step Sa7, carry out profile and detect processing.After carrying out this profile detection processing, the CPU of all control part 62 standbies to next time from last stage arrangement receives till the indication of change displaying contents.Thereby, the main flow of Fig. 4 at every turn from carry out during the CPU indication change displaying contents of stage arrangement.
Fig. 5 is that profile detects the detailed process flow diagram of handling.
At first, among the step Sb1, all control parts 62 are made as 1 row, 1 row with concerned pixel.Here, concerned pixel is meant the convenient pixel of paying close attention in order to detect profile.Says with detailing, like Fig. 6, concerned pixel with 1 row, 1 row～1 row n row, 2 row, 1 row～2 row n row, 3 row, 1 row～3 row n row ..., (m-1) row 1 row～(m-1) gos the order that n is listed as, the capable n of the capable 1 row～m of m is listed as and move.
Among the step Sb1,, concerned pixel is made as 1 row, 1 row as initial value.
Among the step Sb2, all control parts 62 are read the pixel value and the pixel value that is positioned at the right adjacent pixel of this concerned pixel of the concerned pixel of setting in 1VRAM51, and whether the XOR (Xor) of differentiating 2 pixel values is " 1 ".Here, pixel value is specified the gray scale of corresponding pixel, if be 2 values as present embodiment, then is " 1 " if specify white, then is " 0 " if specify black.
Thereby among the step Sb2, there are following 2 kinds of occasions in the XOR of 2 pixel values when being " 1 ".That is, as the pixel value of the concerned pixel of Fig. 7 (a) be " 1 " and right adjacent pixel pixel value for the occasion of " 0 " and as the pixel value of the concerned pixel of Fig. 7 (b) be the occasion of " 1 " for the pixel value of " 0 " right adjacent pixel.In these 2 kinds of occasions, all control parts 62 all add one with variable Count in step Sb3.
On the other hand, among the step Sb2, the XOR of 2 pixel values is not the occasion of " 1 ", and promptly also there are following 2 kinds of occasions in the occasion of " 0 ".That is, all be the occasion of " 1 " like the pixel value of the pixel value of the concerned pixel of Fig. 7 (c) and right adjacent pixel and all be the occasion of " 0 " like Fig. 7 (d).If one of these 2 kinds, add a processing among then all control part 62 skips steps Sb3.
Among the step Sb2, differentiate whether between concerned pixel and right adjacent pixel, formed profile, but same differentiation work is carried out to being positioned at pixel adjacent under the concerned pixel also.It is step Sb4.
Say that at length among the step Sb4, all control parts 62 are read the pixel value and the pixel value that is positioned at pixel adjacent under this concerned pixel of concerned pixel, whether the XOR (Xor) of differentiating 2 pixel values is " 1 ".
Here, among the step Sb4, there are following 2 kinds of situation in the XOR of 2 pixel values for the occasion of " 1 ".That is, as the pixel value of the concerned pixel of Fig. 7 (e) be " 1 " pixel value of descending adjacent pixel for the occasion of " 0 " and as the pixel value of the concerned pixel of Fig. 7 (f) to descend the pixel value of adjacent pixel for " 0 " be the occasion of " 1 ".One of if 2 kinds, then all control parts 62 add one with variable Count in step Sb5.
On the other hand, among the step Sb4, also there are following 2 kinds of situation in the XOR of 2 pixel values for the occasion of " 0 ".That is, all be the occasion of " 1 " like the pixel value of the concerned pixel of Fig. 7 (g) and the pixel value of adjacent pixel down and all be the occasion of " 0 " like Fig. 7 (h).If one of these 2 kinds, add a processing among then all control part 62 skips steps Sb5.
Among the step Sb6, whether the concerned pixel that all control parts 62 are differentiated in the current time is the capable n row of m, the final row of promptly final row.If this differentiates the result, then among the step Sb7, all control parts 62 make that concerned pixel is adjacent to be moved to the right, or, have only concerned pixel when the right-hand member of arranged is final n row, make concerned pixel mobile to next line and initial the 1st row.Then, treatment step returns step Sb2.
On the other hand, if the differentiation result among the step Sb6 " is " then variable Count is counted in amount horizontal or vertically adjacent place with white pixel and black picture element, so this profile to detect the processing end.
In addition, there is not pixel in the right neighbour of the pixel of final n row.Thereby, when concerned pixel is the n row, not execution in step Sb2, only execution in step Sb4.There is not pixel in the following neighbour of the pixel that equally, finally capable m is capable.Thereby concerned pixel is m when capable, not execution in step Sb4, only execution in step Sb2.
In addition, by the trimming function of step Sb2 among Fig. 5 and the realization of the juggling among Sb4 extraction profile, these differentiate the occasion of result for " being ", by the processing realization tally function that adds of variable Count.In addition, the juggling by the variable Count among the step Sa3 among Fig. 4 realizes discrimination function.
When then, changing to the display image of Fig. 8 (b) with the display image of Fig. 8 (a) is the concrete work of example explanation electro-optical device 1.
As stated, display part 10 carries out the occasion of display image change, and when variable Count surpassed threshold value Th1, display image was rewritten (step Sa4) through refreshing to drive.
With reference to Fig. 9 such driving that refreshes is described.
At first, image before changing is shown in Fig. 9 (a), and is identical with Fig. 8 (a), reflects the memory contents of 2VRAM52.
Then, refresh drive control part 66 shown in Fig. 9 (b), gated sweep line drive circuit 130 and data line drive circuit 140 make that the image before rewriting is that making the white pixel anti-phase is black picture element in the 2VRAM52 image stored.At length say, refresh drive control part 66 gated sweep line drive circuits 130, make with the 1st row, the 2nd row, the 3rd row ..., (m-1) row, the capable such select progressively sweep trace 112 of m.And; Refresh drive control part 66 control data line drive circuits 140, feasible memory contents with reference to 2VRAM52 is in the pixel of the sweep trace that is arranged in selection 112; Pixel for pixel value " 1 "; Apply+voltage of 15V to data line 114,, apply the voltage (promptly become use together electrode 36 idiostatic) of 0V to data line 114 for the pixel of pixel value " 0 ".In addition,, also may be controlled to data line 114 is broken off, become the high impedance status (floating state) that electric aspect is not connected with any part for the pixel of pixel value " 0 ".
After being selected, sweep trace 112 becomes high level, therefore, the TFT conducting (conducting state) that gate electrode is connected with this sweep trace 112, pixel electrode 32 becomes the state that is electrically connected with data line 114.
Thereby originally the pixel of white is a black through the reverse anti-phase of direction of an electric field, and on the other hand, originally the pixel of black is kept black owing to do not produce electric field.Thereby through this control, shown in Fig. 9 (c), whole pixels become black.
In addition,, select sweep trace 112 in order here, still,, also can skip selection for the sweep trace 112 that does not produce change all of 1 row amount from the 1st row.
Then, refresh drive control part 66 gated sweep line drive circuits 130 and data line drive circuit 140, shown in Fig. 9 (d), make whole pixels be white from the black anti-phase at this.At length say, refresh drive control part 66 gated sweep line drive circuits 130, selecting sweep trace 112 in order, and control data line drive circuit 140, apply-voltage of 15V with data line 114 to each row.Through this control, like Fig. 9 (e), this whole pixel becomes white.
Then, refresh drive control part 66 gated sweep line drive circuits 130 and data line drive circuit 140,,, that is, become the pixel of black to write and to rewrite the corresponding image in back like Fig. 9 (f).At length say, refresh drive control part 66 gated sweep line drive circuits 130, to select sweep trace 112 in order; Simultaneously, control data line drive circuit 140 is with the memory contents with reference to 1VRAM51; In the pixel of the sweep trace that is arranged in selection 112,, apply+voltage of 15V to data line 114 for the pixel of pixel value " 0 "; For the pixel of pixel value " 1 ", apply the voltage of 0V to data line 114.
Thereby, to pixel electrode applied+pixel of the voltage of 15V is a black through the reverse anti-phase of direction of an electric field, on the other hand, therefore data line 114 keeps white for the pixel of 0V has no variation at direction of an electric field during selection.Thereby, like Fig. 9 (g), become the show state of the memory contents of reflection 1VRAM51.
Through refresh drive make whole pixels be black after; Because this is made as white with whole pixels; Therefore in the original image, make the influence the opposing party's in a side the pixel pixel even white pixel and black picture element are adjacent, also can eliminate its influence.Pixel to black under the state that influence is eliminated newly writes, and therefore, can not produce the profile after image of Fig. 8 (c), can realize the correct demonstration of Fig. 8 (b) or Fig. 9 (g).
On the other hand, the occasion of display part 10 change display images, variable Count is when threshold value Th1 is following, and display image does not refresh driving, and rewrites (step Sa6) through differential driving.
Such differential driving is explained with reference to Figure 10.
At first, image before changing is shown in Figure 10 (a), and it is identical with Fig. 8 (a), reflects the memory contents of 2VRAM52.
Differential driving control part 68 gated sweep line drive circuits 130 and data line drive circuit 140 make shown in Figure 10 (b), relatively rewrite the image of front and back, only make the pixel inversion of change.At length say, differential driving control part 68 gated sweep line drive circuits 130, make with the 1st row, the 2nd row, the 3rd row ..., (m-1) row, the capable such select progressively sweep trace 112 of m.And differential driving control part 68 is with reference to 1VRAM51 and 2VRAM52, control data line drive circuit 140; Make pixel at the sweep trace that is arranged in selection 112, be changed to the pixel of " 1 " from " 0 ", apply-voltage of 15V to data line 114 for pixel value; Be changed to the pixel of " 0 " from " 1 " for pixel value; Apply+voltage of 15V to data line 114,, apply the voltage of 0V to data line 114 for the pixel that pixel value does not change.
Thereby, to pixel electrode applied-15V or+the reverse anti-phase through direction of an electric field of the pixel of the voltage of 15V, on the other hand, applied in the pixel of voltage of 0V to pixel electrode, have no variation, therefore keep original state.Thereby, like Figure 10 (c), become the show state of the memory contents of reflection 1VRAM51.
Only vicissitudinous pixel is rewritten through differential driving, so power can unnecessary consumption.In addition, this differential driving is that threshold value Th1 carries out when following at variable Count only in the occasion of change display image, and therefore, the after image that profile causes is not eye-catching yet.And, and refresh drive ratio, actuation step is few, therefore more at a high speed, and partial pixel becomes black, partial pixel and becomes white state at least in the way that drives, therefore with refresh drive ratio, also have the advantage that makes the observer be difficult to discern flicker.
Like this, according to present embodiment, produce the occasion of change at the displaying contents of display part 10; If begin the accumulated value of the white pixel place counting adjacent with black picture element is surpassed threshold value Th1 from the driving that refreshes last time; Then refresh driving,, then carry out differential driving if below threshold value Th1.Thereby, according to present embodiment, can realize reducing the high-quality demonstration and the low consumpting powerization of after image simultaneously.And, can carry out demonstration at a high speed and switch, obtain to reduce the effect of flicker.
In addition, among the 1st embodiment, when displaying contents changes, carry out main flow shown in Figure 4, still, also can carry out at interval with official hour.During this constitutes, when variable Count surpasses threshold value Th1, refresh driving, but after this refreshes driving, also write identical image.
< the 2nd embodiment >
Above-mentioned the 1st embodiment, when driving the accumulated value begin the white pixel place counting adjacent with black picture element from refreshing last time and surpass threshold value Th1, execution refreshes driving.Thereby when the change of displaying contents repeatedly produced, this accumulated value then refreshed driving and does not carry out as below threshold value Th1.At this moment, adjacent state all takes place when displaying contents changes at every turn in identical place even white pixel is with black picture element, because after image only stops in identical place, therefore thinks that its influence is little.
But among the 1st embodiment, when repeatedly adjacent, therefore this place repeat count, might frequently be carried out and refresh driving in identical place for white pixel and black picture element, and there is room for improvement in this point.
Thereby, the 2nd embodiment that improves this point is described.The profile that the electro-optical device of the 2nd embodiment has changed among the 1st embodiment detects the content of handling (the step Sa7 among Fig. 4 and Fig. 5).In addition, among the step Sa5 in the main flow (with reference to Fig. 4), except variable Count resets to zero, whole boundary markers also resets to zero.
Here; Boundary marker is shown in figure 12, with press m capable * sign of the corresponding setting in border of the pixel 20 that n column matrix shape is arranged, till representing to be driven into current time from refreshing last time; Two pixels that whether clip the border become white and black, and this border becomes the outline portion of image.
Figure 11 is that the profile of the 2nd embodiment detects the process flow diagram of handling.
At first, among the step Sc1, all control parts 62 are made as 1 row, 1 row with concerned pixel.Then, among the step Sc2, all control parts 62 are read the pixel value of concerned pixel and the pixel value of the pixel that is positioned at the right neighbour of this concerned pixel in 1VRAM51, and whether the XOR (Xor) of differentiating 2 pixel values is " 1 ".
If this differentiates the result " denys " that then 2 pixels all are the homochromy of white or black, do not form profile.Thereby, the step Sc6 that states after treatment step jumps to.
On the other hand, if differentiate the result " be ", then in 2 pixels, a side be white, and the opposing party is a black, the formation profile.
Thereby among the step Sc3, all control parts 62 are differentiated and whether the right adjacent suitable boundary marker of concerned pixel is " 0 ".If differentiating the result, this " denys " the step Sc6 that states after then treatment step jumps to.
On the other hand, " be " that then among the step Sc4, all control parts 62 will be made as " 1 " with the right adjacent suitable boundary marker of concerned pixel if differentiate the result.
Here, reset to zero back immediately after drivings (step Sa4) and can not be made as " 1 " in addition refreshing last time with the right adjacent suitable boundary marker of concerned pixel at step Sc4.Thereby, the differentiation result among step Sc2 and the Sc3 all be the occasion of " being " represent from refreshing last time be driven into differentiate this time till, concerned pixel and right adjacent pixel become the outline portion of image first.Thereby if this occasion, then among the step Sc5, all control parts 62 add one with variable Count.
In addition, variable Count adds one occasion and has following 2 kinds of situation among the step Sc5.That is, as the pixel value of the concerned pixel of Figure 13 (a) be " 1 " and right adjacent pixel pixel value for the right adjacent suitable boundary marker of " 0 " and so far and concerned pixel for the occasion of " 0 " and as the pixel value of the concerned pixel of Figure 13 (b) be the occasion of " 0 " for the pixel value of " 0 " right adjacent pixel for " 1 " and suitable with the right side neighbour of concerned pixel so far boundary marker.
In addition; Be made as till " 1 " back refreshes driving to execution next time from right adjacent suitable boundary marker with concerned pixel; Even concerned pixel and right adjacent pixel become the outline portion of image once more, because the differentiation result among the step Sc3 is " denying ", so the processing that adds of step Sc5 is skipped.Thereby, even form profile in identical place, can be to variable Count repeat count yet.
Same differentiation work is also carried out being positioned at pixel adjacent under the concerned pixel.
That is, among the step Sc6, all control parts 62 are read the pixel value and the pixel value that is positioned at pixel adjacent under this concerned pixel of concerned pixel in 1VRAM51, and whether the XOR (Xor) of differentiating 2 pixel values is " 1 ".
If this differentiates the result " denys " to state step Sc10 after then treatment step jumps to.On the other hand, " be " that then among the step Sc7, all control parts 62 differentiate and whether the suitable boundary marker of following neighbour of concerned pixel is " 0 " if differentiate the result.If this differentiates the result " denys " that then treatment step jumps to step Sc10.
On the other hand, " be " that then among the step Sc8, all control parts 62 are made as " 1 " with the boundary marker suitable with the following neighbour of concerned pixel if differentiate the result.
Differentiation result among step Sc6 and the Sc7 is till the occasion of " being " is represented to be driven into this time from refreshing last time, and concerned pixel and adjacent pixel down become the outline portion of image first.Thereby if this occasion, then among the step Sc9, all control parts 62 add one with variable Count.
In addition, variable Count adds one occasion and has following 2 kinds of situation among the step Sc9.That is, as the pixel value of the concerned pixel of Figure 13 (c) be " 1 " pixel value of descending adjacent pixel for the suitable boundary marker of " 0 " and following neighbour so far and concerned pixel for the occasion of " 0 " and as the pixel value of the concerned pixel of Figure 13 (d) to descend the pixel value of adjacent pixel for " 0 " be that " 1 " and suitable with the following neighbour of concerned pixel so far boundary marker are the occasion of " 0 ".
In addition; Be made as till " 1 " back refreshes driving execution to next time from the boundary marker suitable with the following neighbour of concerned pixel; Even concerned pixel and following adjacent pixel become the outline portion of image once more, because the differentiation result among the step Sc7 is " denying ", so the processing that adds of step Sc9 is skipped.Thereby, even in identical place profile takes place, can be to variable Count repeat count yet.
Among the step Sc10, whether the concerned pixel that all control parts 62 are differentiated in the current time is the capable n row of m.If this differentiates the result, then among the step Sc11, all control parts 62 make that concerned pixel is adjacent to be moved to the right, or, when to have only concerned pixel be final n row, make concerned pixel mobile to next line and initial the 1st row.Then, treatment step returns step Sc2.
On the other hand, if the differentiation result among the step Sc10 " is " then with the amount that drives beginning from refreshing last time and become first the place of profile variable Count is counted, so this profile to detect processing and finishes.
According to the 2nd embodiment, produce the occasion of change at the displaying contents of display part 10, only variable Count is counted when adjacent first driving the beginning white pixel from refreshing last time with black picture element.When this variable Count surpasses threshold value Th1, carry out and refresh driving, when threshold value Th1 is following, carry out differential driving.Thereby,, can improve and refresh the frequent situation of carrying out that drives according to the 2nd embodiment.
< the 3rd embodiment >
Consider the reason of above-mentioned after image once more.When white pixel and black picture element are adjacent, the influence the opposing party's in a side the pixel pixel, therefore, after image should be able to take place constantly in this.But, think and focused on the visuognosis that in fact the after image that should take place is not so eye-catching except the white pixel state adjacent with black picture element.
In other words, can think that the eye-catching of after image is not when white pixel is adjacent with black picture element, but adjacent 2 pixels of different form and aspect exist to be different from the look (after image) that changes the back color, so become eye-catching all when homochromy transformations.
Above-mentioned the 1st embodiment is the number of times accumulation that white pixel is adjacent with black picture element; The 2nd embodiment is that execution refreshes driving when this accumulated value (variable Count) surpasses threshold value Th1 from refreshing to drive and begin the number of times accumulation that white pixel is adjacent first with black picture element last time.Thereby, among the 1st or the 2nd embodiment, refresh driving although might under the so not eye-catching state of after image, also carry out, in this point, also have room for improvement.
Thereby then explanation improves the 3rd embodiment of this point.The electro-optical device of the 3rd embodiment is roughly said; Exist change to make mutual 2 adjacent pixels become the occasion in homochromy place through displaying contents; And a side is a white pixel in its state before changing; When the opposing party is black picture element, can think to count as variable Count with this place because of change makes the eye-catching occasion of after image.
In addition, the 3rd embodiment and the 2nd embodiment are same, and the profile that has changed among the 1st embodiment detects processed content.In addition, among the step Sa5 in the main flow (with reference to Fig. 4), except variable Count resets to zero, with whole boundary markers all reset to zero aspect and the 2nd embodiment same.
Figure 14 and Figure 15 are respectively that the profile of expression the 3rd embodiment detects the process flow diagram of handling.
At first, among the step Sd1, all control parts 62 are made as 1 row, 1 row with concerned pixel.Then, among the step Sd2, all control parts 62 are read the pixel value of concerned pixel and the pixel value of the pixel that is positioned at the right neighbour of this concerned pixel in 1VRAM51, and whether the XOR (Xor) of differentiating 2 pixel values is " 0 ".
If this differentiates the result, represent that then 2 pixels are the inequality look, therefore, the step Sd5 that states after treatment step jumps to.
On the other hand, " be " to represent that then 2 pixels all are the homochromy of white or black if differentiate the result.Thereby among the step Sd3, all control parts 62 are further differentiated and whether the right adjacent suitable boundary marker of concerned pixel is " 1 ".
The implication of boundary marker among the 3rd embodiment and the 2nd embodiment is slightly different.That is, the boundary marker among the 3rd embodiment is same with the 2nd embodiment aspect being provided with the border of pixel is corresponding, still, last time replacement drive reset to zero after, even temporarily be made as " 1 ", also can reset to " 0 " once more, this point is different from the 2nd embodiment.In a word, if the boundary marker among the 3rd embodiment " 1 " then is illustrated under the displaying contents state before changing, clip in 2 pixels on this border, a side is a white, and the opposing party is a black.
Thereby the differentiation result among step Sd2 and the Sd3 is the occasion of " being ", and the change that is concerned pixel and right adjacent pixel through displaying contents becomes homochromy occasion, and a side is a white pixel in its state before changing, and the opposing party is the occasion of black picture element.
Thereby if this occasion, then in step Sd4, all control parts 62 add one with variable Count.
In addition, variable Count adds one occasion and has following 4 kinds of situation among the step Sd4.That is, the 1st kind is that the pixel value of the concerned pixel of Figure 16 (a) changes to " 1 " from " 0 ", and the pixel value of right adjacent pixel is not from the occasion of " 1 " change.The 2nd kind be the pixel value of concerned pixel of Figure 16 (b) from " 1 " change, and the pixel value of right adjacent pixel changes to the occasion of " 1 " from " 0 ".The 3rd kind is that the pixel value of the concerned pixel of Figure 16 (c) changes to " 0 " from " 1 ", and the pixel value of right adjacent pixel is not from the occasion of " 0 " change.The 4th kind be the pixel value of concerned pixel of Figure 16 (d) from " 0 " change, and the pixel value of right adjacent pixel changes to the occasion of " 0 " from " 1 ".
In above-mentioned 4 kinds of situation, with the right adjacent suitable boundary marker of concerned pixel all be " 1 ".
Then, all control parts 62 are in order to prepare next time at same place execution in step Sd3, to carry out to make and this processing of state of concerned pixel and right adjacent pixel of the right adjacent suitable boundary marker reflection of concerned pixel.Be step Sd5～Sd7.Promptly; Whether the XOR (Xor) of the pixel value of all control part 62 differentiation concerned pixels and the pixel value of right adjacent pixel is " 1 " (step Sd5); If this differentiation result " is "; Then will be made as " 1 " (step Sd6), if this differentiation result then resets to " 0 " (step Sd7) for " denying " with the right adjacent suitable boundary marker of concerned pixel.
Same work is also carried out being positioned at pixel adjacent under the concerned pixel.
That is, among the step Sd8 of Figure 15, all control parts 62 are read the pixel value and the pixel value that is positioned at pixel adjacent under this concerned pixel of concerned pixel in 1VRAM51, and whether the XOR (Xor) of differentiating 2 pixel values is " 0 ".
If this differentiates the result, then treatment step jumps to step Sd11, on the other hand, if differentiate the result " is ", and then among the step Sd9, whether all control part 62 further differentiations are " 1 " with the suitable boundary marker of following neighbour of concerned pixel.
Differentiation result among step Sd8 and the Sd9 is the occasion of " being ", and it is homochromy that the change through displaying contents that is concerned pixel with adjacent pixel down becomes, and a side is a white pixel in its state before changing, and the opposing party is the occasion of black picture element.
Thereby if this occasion, then among the step Sd10, all control parts 62 add one with variable Count.
In addition, variable Count adds one occasion and also has following 4 kinds of situation among the step Sd10.That is, the 1st kind is that the pixel value of the concerned pixel of Figure 16 (e) changes to " 1 " from " 0 ", and down the pixel value of adjacent pixel not from the occasion of " 1 " change.The 2nd kind be the pixel value of concerned pixel of Figure 16 (f) from " 1 " change, and down the pixel value of adjacent pixel changes to the occasion of " 1 " from " 0 ".The 3rd kind is that the pixel value of the concerned pixel of Figure 16 (g) changes to " 0 " from " 1 ", and down the pixel value of adjacent pixel not from the occasion of " 0 " change.The 4th kind be the pixel value of concerned pixel of Figure 16 (h) from " 0 " change, and down the pixel value of adjacent pixel changes to the occasion of " 0 " from " 1 ".
In above-mentioned 4 kinds of situation, the boundary marker suitable with the following neighbour of concerned pixel all is " 1 ".
All control parts 62 are in order to prepare next time at same place execution in step Sd9; Differentiate whether the pixel value of concerned pixel and the XOR (Xor) of the pixel value of following adjacent pixel are " 1 " (step Sd11); If this differentiation result " is "; The boundary marker suitable with the following neighbour of concerned pixel is made as " 1 " (step Sd12), " denys " then to reset to " 0 " (step Sd13) if this differentiates the result.
Among the step Sd14, whether the concerned pixel that all control parts 62 are differentiated in the current time is the capable n row of m.If this differentiates the result, then among the step Sd15, all control parts 62 make that concerned pixel is adjacent to be moved to the right, or, when to have only concerned pixel be final n row, make concerned pixel mobile to next line and initial the 1st row.Then, treatment step returns the step Sd2 of Figure 14.
On the other hand, if the differentiation result among the step Sd14 " is " that then this profile detects the processing end.
According to the 3rd embodiment, produce the occasion of change at displaying contents, to make 2 adjacent pixels become the amount that these 2 pixels form the place of profile under homochromy and its state before changing through change variable Count is counted.When this variable Count surpasses threshold value Th1, carry out and refresh driving, when threshold value Th1 is following, carry out differential driving.Thereby, according to the 3rd embodiment, can be not in not so eye-catching state and also carried out the situation that refreshes driving although improve after image.
<use, be out of shape >
The invention is not restricted to the foregoing description, can carry out following application, distortion.
Like Figure 17, in the viewing area 100, in the regional 100a of text box, the change of displaying contents takes place when each input characters, symbol etc.Equally, in the regional 100c of cursor 100b predetermined movement, when indicating this cursor 100b mobile, the change of displaying contents takes place at every turn.
The profile after image takes place when displaying contents changes, and therefore, after image is concentrated the possibility height in the zone of the frequent change of displaying contents that occurs in as regional 100a, regional 100c.
Thereby; Also can constitute is divided into viewing area 100 a plurality of; When respectively each cut zone being carried out trimming function, tally function and discrimination function, only variable Count is carried out above the pixel that cut zone comprised of threshold value Th1 and refresh driving.Through such formation, the pixel that refreshes driving is defined, and therefore can suppress consumed power, and can effectively reduce and concentrate the after image that takes place.
In addition, the zone of refreshing driving can be suppressed at necessary Min., therefore, drives all occasions in viewing area 100 relatively with refreshing, and can suppress flicker.
In addition, the threshold value Th1 of this moment also can set according to the number of the pixel of cutting apart that the zone comprised.In addition, if the formation of this zone not being carried out trimming function, tally function and discrimination function respectively then also can be adopted in the zone that exists displaying contents not change.
In addition, among each embodiment, display part 10 is made as the two-value of carrying out white and black and shows, but also can be that middle gray shows.This be because, adjacent and when forming profile with different gray scales even show the occasion of middle gray in pixel, the influence the opposing party's in a side the pixel pixel, therefore same generation after image.
The occasion that shows middle gray as the condition that extract out in the place that will form profile, also can be pixel value (gray-scale value, grey level) poor in 2 pixels of differentiation.For example to gray scale be defined as the lead＜bright slightly grey＜bright grey＜white of black＜lead＜slightly like this situation of the brightness of order study.
When the difference of gray-scale value was big, when for example the pixel of black or dimmed pixel and white or bright grey was adjacent, electric field effects was big, therefore can variable Count be added one.On the other hand, the difference of gray-scale value hour when the pixel of for example dimmed slightly pixel and bright slightly grey is adjacent, influences for a short time, therefore variable Count is not added one, or, can variable Count be added one in the ratio of a plurality of places being counted 1 time.
On the other hand, be the occasion that the pixel of inclined to one side black appears in background in vain, visuognosis after image especially easily, so in this occasion also can adopt to make variable Count preferentially add one formation (raising adds the formation of one frequency).
In addition; Among each embodiment; Employing is by the formation of the discrimination function of trimming function, tally function and the accumulated value of the profile of controller 60 execution concerned pixels and subject pixels (right adjacent or following adjacent pixel), and still, wanting images displayed in the display part 10 is the control regulation of CPU by external device (ED).Thereby, also can adopt these functions to carry out by this CPU or the PC of more going up stage arrangement and control according to these results and refreshing constituting of driving and differential driving in the display part 10 by controller 60.
Among each embodiment, adopt the formation that refreshes driving or the profile extraction back execution of differential driving in concerned pixel and subject pixels, but be not limited thereto.For example, if judge the type of drive that whether begins the driving of each pixel and upgrade the image of each frame, then can differentiate variable Count and whether surpass threshold value Th by frame by frame; If surpass; Then interrupt the renewal in this frame, and stop the driving of pixel, carry out then and refresh driving.
In addition, the shape of pixel electrode is not limited to square, rectangle, also can be polygon, circle, in addition, also can be the economize on electricity utmost point that comprises the different shape of so-called 7 nodal patterns.Adopt the occasion of the economize on electricity utmost point, the utmost point that for example respectively economizes on electricity is directly connected to data line, the current potential of the control of Electric potentials economize on electricity utmost point (pixel electrode) through data line.Even in these occasions,, can obtain same effect with above-mentioned each embodiment through whether pixel electrode is surpassed threshold value Th with different gray scales adjacent place counting and differentiation variable Count.
Among each embodiment, be that example is illustrated to refresh driving for comprising the mode that the regional whole pixels that comprised of the regulation of carrying out the profile extraction are rewritten as the step of single gray scale, but the mode that refreshes driving is not limited thereto.For example, refresh the occasion that drives back display image A, refreshing driving and also can be the 1st step of the gray scale anti-phase image that comprises display image A and the mode of the 2nd step of display image A after the 1st step.Even in this occasion,, therefore can eliminate after image because refresh step comprises the step that the corresponding pixel (that is, with different gray scales adjacent concerned pixel and subject pixels) in place of counting in the profile extraction is rewritten as single gray scale.
In addition, other modes that refresh driving also can be to comprise the mode that the corresponding pixel (that is, with different gray scales adjacent concerned pixel and subject pixels) in place with counting during profile is extracted out is rewritten as at least the step of single gray scale.Even in this occasion, also can eliminate after image through refreshing to drive.
< electronic equipment >
The example of the electronic equipment of the electro-optical device that is suitable for the foregoing description then, is described.Figure 18 (a) is the stereographic map that adopts the E-book reader of this electro-optical device.
But the electro-optical device of the front cover 1002 that E-book reader 1000 possesses the frame 1001 of book shape, be provided with this frame 1001 freely openable ground, operating portion 1003, embodiment.But in the electro-optical device among the figure, only expose viewing area 100.In the E-book reader 1000, the content of e-book is 100 demonstrations in the viewing area, through operating operation portion 1003, stir the page of e-book.
In addition, Figure 18 (b) is the stereographic map of wrist-watch 1100 that adopts the electro-optical device of the foregoing description.This wrist-watch 1100 possesses the electro-optical device of embodiment, and viewing area 100 is exposed.In this wrist-watch 1100, constantly, the date 100 shows in the viewing area.
In addition, as the electronic equipment of the electro-optical device of applicable the foregoing description, can also be Electronic Paper, electronic documentation, electronic calculator, portable telephone etc.
Claims (15)
1. a control device is characterized in that, this control device is the control device that comprises the display part of the pixel that has display element respectively,
When the accumulated value that pixel is counted with the adjacent place of different gray scales in the zone of regulation in the above-mentioned display part images displayed was surpassed setting, the indication that refreshes driving was carried out in output in the zone of afore mentioned rules.
2. the described control device of claim 1 is characterized in that,
When above-mentioned accumulated value surpasses the afore mentioned rules value, after indication all is rewritten as single gray scale with the pixel that the zone comprised of afore mentioned rules,
Be different from the rewriting of the pixel of above-mentioned single gray scale in the pixel that the zone comprised of indication afore mentioned rules.
3. the described control device of claim 2 is characterized in that,
Above-mentioned accumulated value is afore mentioned rules value when following, and the rewriting of the pixel of change is arranged in the zone of indication afore mentioned rules.
4. each described control device of claim 1 to 3 is characterized in that, comprising:
Trimming function, pixel is with the adjacent place of different gray scales in the zone of extraction afore mentioned rules;
Tally function is to the place counting of extracting out through above-mentioned trimming function;
Discrimination function is differentiated the accumulated value that obtains through this tally function and whether is surpassed the afore mentioned rules value.
5. the described control device of claim 4 is characterized in that,
Above-mentioned trimming function is extracted the pixel place when adjacent with different gray scales for the first time out after the demonstration of last time above-mentioned single gray scale.
6. a control device is characterized in that, this control device is the control device that comprises the display part of the pixel that has display element respectively,
When the accumulated value that in the zone of regulation, all is changed to the place counting of same gray scale with different gray scale adjacent pixels in the above-mentioned display part images displayed was surpassed setting, the indication that refreshes driving was carried out in output in the zone of afore mentioned rules.
7. each described control device of claim 1 to 6 is characterized in that,
The zone of afore mentioned rules is made up of in a plurality of pixels in the above-mentioned display part all or part of.
8. each described control device of claim 1 to 7 is characterized in that,
Above-mentioned refresh to drive comprise the step that whole pixel that the zone comprised of afore mentioned rules is rewritten as single gray scale.
9. an electro-optical device is characterized in that, comprising:
Display part comprises a plurality of pixels that have display element respectively;
Control device when the accumulated value of in above-mentioned display part images displayed, in the zone of regulation, counting with the place of different gray scale adjacent pixels is surpassed setting, is controlled, and refreshes driving in the zone of afore mentioned rules, to carry out.
10. an electro-optical device is characterized in that, comprising:
Display part comprises a plurality of pixels that have display element respectively;
Control device when the accumulated value that in above-mentioned display part images displayed, in the zone of regulation, all is changed to the place counting of same gray scale with different gray scale adjacent pixels is surpassed setting, is controlled, and refreshes driving in the zone of afore mentioned rules, to carry out.
11. claim 9 or 10 described electro-optical devices is characterized in that,
Above-mentioned refresh to drive comprise the step that whole pixel that the zone comprised of afore mentioned rules is rewritten as single gray scale.
12. a method of driving electro-optical device is characterized in that this electro-optical device possesses display part, above-mentioned display part comprises a plurality of pixels that have display element respectively,
In this driving method,
To in the above-mentioned display part images displayed in the zone of regulation with the place of different gray scale adjacent pixels counting,
Whether the accumulated value of differentiating this counting surpasses setting,
When differentiating above-mentioned accumulated value, control, refresh driving in the zone of afore mentioned rules, to carry out above the afore mentioned rules value.
13. a method of driving electro-optical device is characterized in that this electro-optical device possesses display part, above-mentioned display part comprises a plurality of pixels that have display element respectively,
In this driving method,
To in the zone of regulation, all being changed to the place counting of same gray scale in the above-mentioned display part images displayed with different gray scale adjacent pixels,
Whether the accumulated value of differentiating this counting surpasses setting,
When differentiating above-mentioned accumulated value, control, refresh driving in the zone of afore mentioned rules, to carry out above the afore mentioned rules value.
14. claim 12 or 13 described method of driving electro-optical device is characterized in that,
Above-mentioned refresh to drive comprise the step that whole pixel that the zone comprised of afore mentioned rules is rewritten as single gray scale.
15. an electronic equipment is characterized in that, comprising:
Claim 9 or 10 described electro-optical devices.
Applications Claiming Priority (2)
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| JP2011020762A JP5830866B2 (en) | 2011-02-02 | 2011-02-02 | Control device, electro-optical device, driving method of electro-optical device, and electronic apparatus |
| JP020762/2011 | 2011-02-02 |
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| CN102708780A true CN102708780A (en) | 2012-10-03 |
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| CN201210023076.7A Active CN102708780B (en) | 2011-02-02 | 2012-02-02 | The driving method of control device, electro-optical device, electro-optical device and electronic equipment |
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| US (1) | US20120194570A1 (en) |
| JP (1) | JP5830866B2 (en) |
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| CN101546524A (en) * | 2008-03-24 | 2009-09-30 | 精工爱普生株式会社 | Electrophoretic display device driving method, electrophoretic display device, and electronic apparatus |
| JP2009251032A (en) * | 2008-04-01 | 2009-10-29 | Seiko Epson Corp | Electro-optical device, driving method of electro-optical device, and electronic apparatus |
| US20100201679A1 (en) * | 2009-02-09 | 2010-08-12 | Seiko Epson Corporation | Driving circuit, driving method, electro-optical apparatus and electronic apparatus |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104937655A (en) * | 2013-01-22 | 2015-09-23 | 精工爱普生株式会社 | Electro-optic device, electro-optic device manufacturing method, and electronic device |
| CN107799053A (en) * | 2017-11-13 | 2018-03-13 | 合肥京东方光电科技有限公司 | Control method and apparatus, time schedule controller, the display device of refreshing frequency |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2012159786A (en) | 2012-08-23 |
| JP5830866B2 (en) | 2015-12-09 |
| TW201234336A (en) | 2012-08-16 |
| CN102708780B (en) | 2016-06-08 |
| US20120194570A1 (en) | 2012-08-02 |
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